There are two that are 2x2 and one that is 2 x 4. As you look at it from the front, one of the 2x2 units is facing to the left. The 2x4 one is butted up against the back unit of that, so the two cubbies at the back of the one on the left end butt up against what would be the top of the 2 x 4 one. On the right end, the other 2x2 one is stacked in front of the lat two cubbies of the 2x4 one, so those four cubbies on the far right are actually 2 units deep. I'll try to do a sketch and attach it.